Gripper mechanism for cylinder-presses.



APPLICATION FILED Jun 16, 1910 Patented Dec. 27, 1910.

3 SHEETS-SHEET 2.

NHL

P. GUILLO.

GRIPPER MECHANISM r011 CYLINDEB- PRESSES.

APPLICATION FILED JUNE 16, 1910.

Patented Dec. 27, 1910 w sw 3 SHEETS-SHEET 3.

To all whom it may concern:

earns GRIPPER MECHANISI I FOR CYLINDEZ-ZPBESSES.

Specification of Letters Patent.

Patented Dec. 27, 1910.

Application filed June 16, 1910. Serial No. 567,175.

Be it known that I, HARRY P. GUILLo, of llevere. in the county ofSuffolk and'State of Massachusetts, a citizen of the United States, haveinvented an Improved Gripper illechanism for Cylinder-Presses, of whichthe following is a specification. I

My ,invention relates particularly to the means whereby pressure isapplied to the grippers to cause them to hold the paper firmly againstthe impression cylinder and also to the means whereby they are causedto-engage and release the paper.

My invention will be understood by reference to the drawings in which-Figure 1 is an end view of an impression cylinder to which mechanism isattached embodying my invention. Fig. 2 shows the other end of the samecylinder together with mechanism embodying my invention in another formas will be explained below,- and Fig. 3 is a front view of theimpression cylinder showing the gripper-operating mechanism inelevation-a portion of. the central portion of the cylinder beingomit,ted. Fig. l is a perspective view of the tumbler lever, and Fig. 5 isaperspective view of the spring abutment. I.

In the drawings A. 's the impression cyiinder which is mounted ontrunnions in the frame A of the press and is rotated in any convenientway. It may be of any length and cooperate With the feed and othermechanism as usual. It is. provided with a gap )6 of proper character"to receive the shaft B and grippers G as described below. The shaft B ismounted in the end'or hearing walls of the cylinder and, when thecylinder is of sufficient length to require it, in intermediatebearings. This shaft carries the grippers C which depend in number uponthe length of the cylinder. They and the shaft and its bearings are ofthe usual character and need not be especially de-' scribed. Theycooperate in the usual manner with front gauges .C afeed board C andstrippers C of any; convenient form.

My improvement relates to the control of the shaft B which causes thegrippers to close upon the sheet and to open to release the sheet.WVhere the cylinder is short, the

gripper-operating mechanism need be located at one end only. Where thecylinder is long there is danger that the torsion of the shaft willaffect the EtCClll'itlt oneration of e grippers and hence thedesirability of the use of mechanism at ea'ch'end of the shaft toprevent this torsion.

As showninfi 1, there is mounted on oneend of the shaft B a tumblerlever D so (see Fig. 4) which comprises a casting having a hub (Zcontaining a socket by means ofwhich it is attached to the shaft B by apin or otherwise to turn it. On its opposite side it-has a groove openat each end to engage the tumbler stud g or g by which as the cylinderrotates the tumbler lever Will be turned to turn the shaft and lift the.r.ippers as below described. The tumbler ever also has a cam surface (Zand an arm d to .which a spring is connected for holdin the gr1ppers inoperative or disengaged POSltlOIlJ,

The spring above referred to is marked E- and is carried on a rod 6 oneend of which 7 5 has an enlargement by which it is pivotally attached.to the arm (Z the said.enlargement having a shoulder 6 The other .end

of the rod slides in a block 6 having trunnions a which set intohearings in one end 8'0 of a yoke lever F which is pivoted at F to thecylinder A thus securing a rockin bearing-for that end of the rod 6. Oneen of the spring E bears against the shoulder e and the other againstthe block 6", the 285 spring being held under considerable compression.The farther and of the yoke lever F carries a cam roll f which rides onthe cam surface (P. It is held against this cam surface by the spring E.The important novelty and value of this construction as it seems to meis the fact that the spring while it is always under compression betweenthe shoulder a and one end of the yoke lever F suflicient to give thegrippers: tight hold v on the paper never materially changes its stress.This is because of the. movements of the yoke lever F which turns freelyon its pivot F and acts as a floating abutmentto the spring, the camsurface d beingshaped to allow for the necessary movements of the yokelever at those moments when particular stress,is brought to bear uponthe spring. Thus the grippers will always be under heavy tension and atthe same time during the releasing movement described below movements ofthe tumbler which might otherwise increase the stress on the spring willbe compensated for by the yiel mg of the yoke lever the amountof which110.v

is controlled by thecam surface.

The only movement given to the tumbler lever is that which is necessaryto move the grippers into and out of engaging relation with the paperand this is accomplished by means of -tumbler studs mounted :in theframe in the. usual we The portion of the irame A shown in big. '3 hasin it-two studs g, 9 eachof which is connected to a lever the end ofwhich (9, g is shown in the drawing. "llhis construction is well knownand need not be further described.

It is such that at the proper time a stud" sheet.

is pushed into the path of the tumbler to engage it and cause it to turnthe shaft B so that the grippers will grip the paper and the study ispnshedinto the path of the tumbler to cause itto turn the grippers torelease the paper.

J is a stop which, engages the tumbler and prevents it from being turnedtoo far on the opening of the grippers.

The operation of the form of my invention described above is as follows:Fig. 1 shows in full lines the gripper, gripper tumbler and other partsin gripping position. The pin 9 has been thrown in to engage the grippertumbler and cause it as it is carried by the cylinder (which moves inthe direction of the arrow) to grip the paper It .will be borne in mindthat the cylinder rotates continuously. The sheet has been fed While thegrippers are open over. the feed board C so that its front edge en- 4gages the front'gages (3 When the grippers have gripped a sheet the studg is withdrawn and the cvlinder rotates carrying the front edge of thesheet the desired distance,

say about a. complete; revolution, when the stud g is projected intothepath of the tun1- bier and engages the corner d et the wall. of the coved 05: the tumbler'as the cylinder continues itemization. This engagementof the tumbler causes its rotation to a sufficient extent to turn thegrippers back, the groove allowing the tumbler to pass the stud. This isillustrated in dotted lines in Fig. 1. This rotation of the tumblertends to comioress the spring- E and would put it to, considerablestraln except I Ioz the compensatlng action of the yoke lever F and camsuriaec 0Z upon which runs the roll 7 on the farther arm of theyokelever F. Such stress is unnecessary, the only time when stress is neededbeing during the time when the spring must press the grippers againstthe paper] After its work is finished the stud g is withdrawn and thecylinder keeps on its rotation until as it reaches the sheet-receivingposition the stud g is projected into the path of the turnbler andengages it at the proper time, turning it and the grippers into grippingposition. The tumbler thus takes the posltion shown in dotted lines inFig. 1. and there re mains until as the cylinder continues .to rotatethe tumbler strings the pin g which has 3 requires it.

the grippers are holding the sheet is coiicen tale with the axis of theshaft, but the rest oi the cam surface is shaped to allow the block 6which serves as an abutment for the spring, to yield slightly asthe-pressure on the spring due to the rotating of the tumbler In Fig. 2there shown without a groove but connectedwith and controlled by aspring suitably mounted in so far as it bears a.t one end against whatmay be termed a floating abutment.

The tumbler is lettered B and its cam sur face 1 It has a hub d? bywhich it is at tached to the shaft 3 from which it derives its motion.its spring is lettered E and it is mounted like the springilil about arod having a shoulder a" against which one end of the spring rests, andmeans of pivotal attachment with the tumbler l3 and also against a block5 like the blocl; e in the end of a slide F This slide F runs adove-tailed. groove concentric with the cylinder in the bracket Fattached to the end of thecylinder and carries at the end opposite is atumbler constructed as to that against which the spring bears a cam 1roll 7 which engages the cam surface d. In this case as before a springhaving a floats ing abutment serves to control the tumbler undersubstantially the sametens'ion at all times, the cam surface serving toallow thefioating abutment to yield when any un-' necessary stress isgiven to the spring due to the turning of the tumbler.

I have showntwo forms of my invention, but I do not mean to limitmyse'lfto these forms or to theii precise arrangement. The floatingabutment shown in Fig. 53 may he used with the tumbler-shown in Fig. and

the floating abutment shown in Fig. "lmay be used at the farther end ofthe cylinder if thought bcst.---without change other than wouldnaturally occur to one skilled in the art.

What I claim as my invention is: Y

1. ln.combi11ation with a gripper shaft,

a tumble lever, a floating abutment and a spring one end of whichengages said tumbier lever, the other. end of said spri 'ig en gagingsaid floating abutment, and means for controlling the movements of Saidabutnient.

2.111 combination with a gripper shalt, a tumbler" lever, means forturning It, a

floating abut1n.ent,1 and a spring one end of which engages said tumblerlever and. the

other said floating abutment, and. means for controlling the movementsof said abutment to maintain said spring at substantially constanttension. 7 a

3. In combination with a grippershaft, a tumbler lever, means forturning it, a, floating abutment, end a spring one end of which engagessaid tumbler lever and the. other said floating abutment, and means forcont-rolling themovements of said abutment comprising a cainrollconnected to said abutment and a cam lo 'ated to control the movementsof said cam roll.

4. In, combination with a gripper shaft, a tumbler lever, means forturning it, a floating abutment, and a spring one end of which engagessaid tunibier lever and the other said floating abutment, and means forcontrolling the movements of said abutment comprising a cam rollconnected to said abutment and :1.- Cam located on said tumbler lever tobe engaged'by said cam roli.

5. In con'ibination With a gripper shaft, 2t tumbler lever, means forturning it, a floating abutment, end a. spring one end of whichengages.saidtumbler lever and the other said floating abutment, andmeans for controlling theinovements of said abutment comprising ainovabl'e support for said abutment carryingfa cam roll, a. cam. locatedon said tumbler lover adapted to be engaged by said can: no?! as and forthe purposesset forth.

HA RR Y P. GU Lib" Wit-nee M. .l FLAHERM, Gnome Lenore-m.

